Worldwide market share for smartphones

AP--Samsung and Apple dominate with nearly half of the worldwide market for smartphones. Samsung had an advantage in releasing its flagship Galaxy S III phone months ago. The latest iPhone is expected at an Apple event Wednesday.

Samsung says global sales of the S III have surpassed 20 million in a little more than three months. The S III came out in Europe in May and in the U.S. in June. A new iPhone should give Apple a boost as the holiday shopping season approaches.

Here are IDC's figures for worldwide smartphone unit shipments and market share in the second quarter of 2012: